PUMA
Istituto di Scienza e Tecnologie dell'Informazione     
Malomo L., Cignoni P., Scopigno R. Generalized trackball for surfing over surfaces. In: STAG 2016 - Smart Tools and Apps for Graphics - Eurographics Italian Chapter Conference (Genova, Italy, 3-4 October 2016). Proceedings, pp. 89 - 97. G. Pintore, F. Stanco (eds.). The Eurographics Association, 2016.
 
 
Abstract
(English)
We present an efficient 3D interaction technique: generalizing the well known trackball approach, this technique unifies and blends the two common interaction mechanisms known as panning and orbiting. The approach allows to inspect a virtual object by navigating over its surrounding space, remaining at a chosen distance and performing an automatic panning over its surface. This generalized trackball allows an intuitive navigation of topologically complex shapes, enabling unexperienced users to visit hard-to-reach parts better and faster than with standard GUI components. The approach is based on the construction of multiple smooth approximations of the model under inspection; at rendering time, it constrains the camera to stay at a given distance to these approximations. The approach requires negligible preprocessing and memory overhead and works well for both mouse-based and touch interfaces. An informal user study confirms the impact of the proposed technique.
URL: http://https://diglib.eg.org/handle/10.2312/stag20161368
DOI: 10.2312/stag.20161368
Subject 3D
HCI
Interaction
Inspection
H.5.2 INFORMATION INTERFACES AND PRESENTATION. User Interfaces


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